US8499458B2 - Method for producing a rolling bearing component and rolling bearing component - Google Patents

Method for producing a rolling bearing component and rolling bearing component Download PDF

Info

Publication number
US8499458B2
US8499458B2 US12/301,277 US30127707A US8499458B2 US 8499458 B2 US8499458 B2 US 8499458B2 US 30127707 A US30127707 A US 30127707A US 8499458 B2 US8499458 B2 US 8499458B2
Authority
US
United States
Prior art keywords
spraying
melt
carbon
sprayed
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US12/301,277
Other languages
English (en)
Other versions
US20090310898A1 (en
Inventor
Werner Trojahn
Silke Roesch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Assigned to SCHAEFFLER KG reassignment SCHAEFFLER KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ROESCH, SILKE, TROJAHN, WERNER
Publication of US20090310898A1 publication Critical patent/US20090310898A1/en
Assigned to SCHAEFFLER TECHNOLOGIES GMBH & CO. KG reassignment SCHAEFFLER TECHNOLOGIES GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHAEFFLER KG
Assigned to Schaeffler Technologies AG & Co. KG reassignment Schaeffler Technologies AG & Co. KG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG
Application granted granted Critical
Publication of US8499458B2 publication Critical patent/US8499458B2/en
Assigned to SCHAEFFLER TECHNOLOGIES GMBH & CO. KG reassignment SCHAEFFLER TECHNOLOGIES GMBH & CO. KG MERGER AND CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: Schaeffler Technologies AG & Co. KG, SCHAEFFLER VERWALTUNGS 5 GMBH
Assigned to Schaeffler Technologies AG & Co. KG reassignment Schaeffler Technologies AG & Co. KG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG
Assigned to Schaeffler Technologies AG & Co. KG reassignment Schaeffler Technologies AG & Co. KG CORRECTIVE ASSIGNMENT TO CORRECT THE PROPERTY NUMBERS PREVIOUSLY RECORDED ON REEL 037732 FRAME 0347. ASSIGNOR(S) HEREBY CONFIRMS THE APP. NO. 14/553248 SHOULD BE APP. NO. 14/553258. Assignors: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG
Expired - Fee Related legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • C23C4/067—Metallic material containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/123—Spraying molten metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/34—Rollers; Needles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/62—Selection of substances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/64—Special methods of manufacture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49636—Process for making bearing or component thereof
    • Y10T29/49705—Coating or casting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49636—Process for making bearing or component thereof
    • Y10T29/49707—Bearing surface treatment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49636—Process for making bearing or component thereof
    • Y10T29/49709—Specific metallic composition

Definitions

  • the invention relates to a method for producing a rolling bearing component having a carbon gradient provided at least in the region of its boundary layer.
  • rolling bearings consist of at least two components, namely one or more rings between which the rolling bodies, for example rollers, run.
  • Such rotationally symmetric rolling bearing components are conventionally produced by machining, for example from case-hardened steel, in which case rings or rollers are either turned on a lathe from a bar or forged from a pin
  • a carburizing treatment is used to set up a gradient structure within which the boundary layer is enriched with carbon by a heat treatment method.
  • Carbonitriding may also be carried out, i.e. nitrogen enrichment in the region of the boundary layer.
  • This boundary layer becomes hard after the carburizing treatment owing to the at least 0.6% enriched carbon and the optionally also enriched nitrogen, the hardness for rolling bearing rings conventionally being 58 HRC or more.
  • the unenriched core remains softer according to the original composition, the hardness there being between 20 and 45 HRC depending on the starting material employed.
  • the ring being produced therefore contains for example a tough core and a hard rolling-resistant outer layer, which is also under compressive internal stresses that have a positive effect.
  • molten metal is sprayed onto a carrier by a spraying process, the carbon content of the metal to be sprayed on being varied during the spraying operation.
  • the rolling bearing component according to the invention is no longer processed from a homogeneous material and subsequently subjected to a corresponding hardening treatment; rather, according to the invention the boundary layer, which conventionally forms the rolling bearing running surface, is produced by a metal spraying method.
  • a metal melt is atomized in a gas atomizer into spherical droplets in a shield gas flow.
  • the gas rapidly cools the metal droplets to a temperature which lies between the liquidus and solidus temperatures, and often even somewhat below the solidus temperature.
  • the drops cooled in this way move at high speed and have a paste-like consistency.
  • the drops When the drops now strike a surface at high speed, for example a carrier ring used to produce the component, or the like, then they are compacted owing to the high kinetic energy which they possess. A high-density material composite is formed. It is therefore possible to produce segregation-free and low-pore metal layers with a homogeneous structure and a high density by spray compacting.
  • the carbon content of the sprayed metal is now varied during the spraying process in order to produce the carbon gradient, which extends radially in conventional rotationally symmetric rolling bearing components, inside the metal layer being sprayed on. This means that depending on the desired carbon gradient, the carbon content of the viscous material sprayed on is varied in the desired way during the spraying process.
  • the completed rolling bearing component inherently has a carbon gradient, at least in the region of the boundary layer, which in the end can be adjusted in any desired way and therefore adapted to requirements, owing to the production according to the invention by a spray-compacting method with a varying carbon content.
  • the very time-consuming heat treatment in the prior art for carburizing can therefore be entirely omitted.
  • the heat treatment of the rolling bearing component which is always to be carried out, therefore now depends only on the component dimension and therefore the weight, but no longer on the thickness of a boundary layer to be modified.
  • the method according to the invention thus utilizes the advantages of the spraying method which is extremely flexible in respect of the composition of the metal layer and therefore adjustment of the physical, chemical and mechanical properties of the metal layer, because the composition of the metal layer can be varied in almost any desired way particularly in respect of the individual constituents which determine the mechanical, physical and chemical properties.
  • the starting materials actually used, and therefore also the molten metal can be selected according to the required properties.
  • the inventive variation of the carbon content takes place within the testing process, so that a further degree of freedom is provided for the method according to the invention.
  • carbon is introduced into the melt from which the sprayed metal is taken. This may be done for example in the form of a carbon wire, which is spooled into the melt, or by means of a carbon powder blown into the melt.
  • the melt itself is enriched with carbon in this configuration of the invention, in which case the carbon content can be varied in any desired way by correspondingly modifying the amount of carbon wire spooled in or the amount of carbon powder blown in.
  • the molten steel necessarily leads, as the spraying process continues, to the growth of a layer which has a different carbon content than the underlying layer, and which is enriched in carbon content to such an extent that the desired carbon content, as it is to be present after carburization, is reached.
  • a further method alternative provides for the use of two or more melts with different carbon contents, which are mixed together to form the melt from which the sprayed metal is taken.
  • the two melts which can be taken from separate melt containers, are delivered to a distributor which may be an integral constituent of the spraying unit, when they are mixed in any desired mixing ratio between 100% of the first melt and 100% of the second melt.
  • any desired carbon content can thus be achieved by mixing techniques between the minimal carbon content of one melt and the maximal carbon content of the other melt.
  • two or more melts with different carbon contents are sprayed by using two or more separate spraying devices, the spray cones overlapping and the output quantities of the spraying devices being varied.
  • a steel with a low carbon content is sprayed on using a first spraying device and a steel with a high carbon content is sprayed on using a second spraying device.
  • the spray cones preferably overlap fully, i.e. they fully merge with one another when sprayed simultaneously.
  • the melts sprayed on can consequently also be mixed together in any desired way. If only the first spraying device is operated, then only the metal sprayable using this is applied.
  • the carbon content of the boundary layer finally produced which consists of a mixture between the two starting melts, increases according to its spraying power, in which case the spraying control may be such that the first spraying device is reduced in its spraying power in proportion to how much the second spraying device is turned on.
  • the carbon content can be varied in any desired way between the minimal carbon content of the first melt and the maximal carbon content of the second melt. Any desired carbon gradients over the layer sprayed on, which need not necessarily be the boundary layer, as will be explained in more detail below, can also be produced by means of this.
  • Nitrogen or a gas enriched with nitrogen is preferably used as a carrier gas for spraying the molten metal. Nitrogen enrichment of the metal layer sprayed on may simultaneously be achieved by means of this, which corresponds to carbonitriding, so that a separate treatment step after the spray-compacting method is likewise no longer necessary for this.
  • one or more hard substances in powder form are blown into the spray cone and these are then incorporated into the metal layer sprayed on.
  • the hard substances may be carbides, nitrides or oxides which are fed into the spray cone in powder form and should have a very fine grain size of from 1 nm to 200 ⁇ m.
  • the fluid molten metal may be sprayed onto a carrier in the form of a prefabricated part, particularly in the form of a tube or a bar of a hardenable material, which part subsequently becomes an integral constituent of the rolling bearing component being produced.
  • a prefabricated carrier is thus used, which has optionally been subjected to initial shaping.
  • a bar or a tube of a appropriately hardenable material may be used as such a carrier, although this prefabricated part may likewise already have the essential contour of the rolling bearing component finally produced, for example an inner or outer ring, or it may be dimensioned accordingly.
  • the prefabricated part close to final contour will be applied on a reusable carrier which holds it during the spraying process and from which it can be removed.
  • a reusable carrier from the outset, onto which the metal is sprayed by the spraying method to form the entire component.
  • a reusable carrier for example a ceramic or concrete tube, onto which, in order to form the essential component body, a melt of a composition that this central component body is intended to have, is sprayed.
  • a case-hardened steel is conventionally used for this.
  • the carbon variation according to the invention is then carried out in order to form the boundary layer.
  • the rolling bearing component is an inner ring, the rolling bearing running surface of which is the outer side. If the rolling bearing component is an outer ring, then the carbon variation according to the invention begins immediately with the first spraying onto the reusable carrier, and the material for forming the essential component body is not sprayed on until after this inner boundary layer has been produced. If an enriched outer boundary layer is additionally intended to be produced, carbon addition according to the invention is again carried out during the final spraying process at the end of the spraying process.
  • the invention relates to a rolling bearing component, particularly in the form of a ring or a roller, comprising at least one boundary layer which is formed by spraying on a molten metal and inside which the carbon content varies at least in sections.
  • the rolling bearing component is produced in particular by the method described in the introduction.
  • the rolling bearing component itself may comprise a prefabricated metallic carrier, in particular a ring close to final contour, or the like, on which the boundary layer is formed.
  • the rolling bearing component as a whole may be a spray-compacted component fully produced by a spraying method.
  • one or more hard substances may be incorporated at least in sections in the boundary layer being sprayed on, which may likewise contain an increased nitrogen content introduced during the spraying method.
  • FIG. 1 shows an outline representation to explain a first method variant
  • FIG. 2 shows a partial view of a rolling bearing component according to the invention with a representation of the carbon gradient
  • FIG. 3 shows an outline representation to explain a second method variant
  • FIG. 4 shows an outline representation to explain a third method variant
  • FIG. 5 shows an outline representation to explain a fourth method variant
  • FIG. 1 shows, in the form of an outline representation, a spraying device 1 by means of which the method according to the invention can be carried out.
  • the spraying device 1 comprises on the one hand the spraying unit 2 , as well as a melt stock container 3 which contains a metal melt S.
  • a carrier gas supply 4 is furthermore provided, here a nitrogen feed. Molten metal to be sprayed is taken continuously from the melt stock container 3 , and is sprayed in the form of very small metal droplets 5 via the carrier gas in a spray cone 6 onto a carrier 7 , in the example shown, a tube of a hardenable material.
  • the carrier 7 rotates and can be moved axially. With increasing rotation and spraying time, an ever-thicker spray-compacted layer is formed on the carrier 7 .
  • carbon C is introduced into the melt S at the appropriate time. This may be done by spooling in a carbon wire or by blowing in carbon powder.
  • the melt is consequently enriched with carbon, and, therefore necessarily, so is the layer 8 being produced.
  • the carbon C is introduced directly into the melt stock container 3 , it is of course possible to introduce it in the melt feed not until immediately before the spraying unit 2 or into the latter itself. In any event, in this exemplary embodiment the carbon C is introduced into the homogeneous melt.
  • a tube for example of a case-hardened steel which is thus hardenable
  • the melt S comprises for example the composition of a case-hardened steel, i.e. the carbon content is less than 0.35%, and optionally contains alloy elements such as Cr (maximum 4%), Mo (maximum 2%), Ni and/or Mn (maximum 4% each) and Si (maximum 1.5) as well as other steel constituents.
  • a first layer 8 a see FIG.
  • the subsequently produced second boundary layer 8 b is enriched even more with carbon as represented in the outline diagram in FIG. 2 .
  • the carbon content is plotted over the cross section of the two layers 8 a, 8 b, and here again it should be pointed out that this is only an outline representation.
  • the maximum carbon content present in the boundary layer 8 b corresponds to the desired carbon content as is likewise conventionally encountered after a carburizing step, which is not required here.
  • the carrier 7 forms an integral constituent of the rolling bearing component being produced.
  • individual rings are cut to length from the carrier 7 in order to form the rolling bearing component, FIG. 2 showing a partial sectional view of such a rolling bearing component 9 cut to length, here in the form of a ring.
  • FIG. 2 shows a partial sectional view of such a rolling bearing component 9 cut to length, here in the form of a ring.
  • rings instead of a continuous tube, it would of course also be possible to use individual prefabricated parts close to final contour, here rings, in which case however they are arranged in series on a reusable carrier (not shown in detail here) and can be taken from it.
  • one or more hard substances H in powder form are blown into the spray cone as shown schematically in FIG. 1 . These hard substances are then incorporated into the metal layer that is sprayed on, in particular to form a wear-resistant boundary layer on the component.
  • FIG. 3 shows another variant for production of the layer comprising a carbon gradient.
  • the spraying device 1 shown here comprising a spraying unit 2 and a melt stock container 3 with the melt S of the original composition and a carrier gas feed 4
  • the carbon C is added at the required time directly into the melt cone 6 where the carbon powder being blown in is immediately entrained by the metal droplets emerging at high speed from the spraying unit 2 and the carrier gas (N 2 ) and is incorporated into the boundary layer being formed (according to the exemplary embodiment of FIG. 2 , the boundary layer 8 b ).
  • N 2 carrier gas
  • FIG. 4 shows a further outline representation to explain another method variant.
  • the spraying device 1 shown here likewise comprises a spraying unit 2 as well as in total three melt stock containers 3 a, 3 b and 3 c.
  • there is a first melt S 1 with a low carbon content in the melt stock container 3 a and the melt stock container 3 b contains a melt S 2 with a high carbon content.
  • These melts are now poured alternately or simultaneously into the third melt stock container 3 c, which then contains either the pure melt S 1 , the pure melt S 2 or a mixed melt of the melts S 1 and S 2 .
  • melt stock container 3 c which need not be a large container, but instead may in this case be a small-dimensioned distributor, the final melt composition to be sprayed is now taken and sprayed via the melt cone 6 with the aid of the inert gas supplied through the carrier gas feed 4 .
  • the carrier 7 in FIG. 4 is for example—other than described above—a reusable carrier, for example a ceramic or concrete tube.
  • the entire rolling bearing component i.e. in this case the ring, is applied onto it by the spray-compacting method.
  • an inner boundary layer is sprayed on in a first spraying stage exclusively by using the melt S 2 having the high carbon content, until the desired layer thickness is reached.
  • the melt S 1 is then added increasingly until the pure melt S 1 is sprayed in order to form the essential component body.
  • the proportion of melt S 2 is now again increased up to at most 100% in the last spraying stage, so that the carbon gradient is also formed there.
  • the entire rolling bearing component is thus produced by the spray-compacting method, the inner and outer boundary layers having the carbon gradient in the example described. In this case, it is of course possible to configure only the inner or outer boundary layer accordingly.
  • FIG. 5 finally shows another outline representation of a spraying device 1 for carrying out the method according to the invention. It comprises two separately operable spraying devices 2 a, 2 b, to which separate melt stock containers 3 a, 3 b are respectively allocated.
  • the melt stock container 3 a contains a melt S 1 having a low carbon content
  • the melt stock container 3 b contains a melt S 2 having a high carbon content.
  • the two spraying devices 2 a, 2 b which in the examples shown are supplied through a common carrier gas supply 4 here, are arranged so that their respective spray cones 6 a, 6 b overlap, in the example shown, fully in the vicinity of the carrier 7 .
  • the carrier 7 is a reusable carrier in the form of a ceramic tube or the like. If, for example, a ring is to be produced with an inner and an outer boundary layer having a carbon gradient, then the spraying unit 2 b begins first by spraying the first layer consisting of the melt S 2 having the high carbon content. After a minimum layer thickness of a few millimeters is reached, the spraying power of the spraying unit 2 b is reduced continuously and the spraying device 2 a is turned on and its spraying power is increased continuously. The reduction and increase of the respective capacity preferably occurs synchronously, so as to provide a total spraying power of 100% at any time.
  • spraying is carried out with 100% melt S 1 , i.e. the rolling body consists only of material from the melt S 1 .
  • the process is then reversed again i.e. the spraying power of the spraying unit 2 a is lowered continuously while that of the spraying unit 2 b is increased continuously.
  • a ring or a tube is obtained with a hardenable bore, a less hardenable core and an again more hardenable outer boundary layer.
  • the method according to the invention allows the simple production of a carbon gradient structure in the region of inner or outer boundary layers.
  • a special carburizing step which takes a very long time, is no longer necessary. This proportion of the production costs is likewise avoided, as is the delay factor due to this heat treatment step, so that the finishing (grinding) becomes less expensive.
  • it furthermore omits excavation of the inner forging burr to be carried out at the start, which amounts to about 25% of the ring weight.
  • the production sequence is shortened significantly in time overall, since the otherwise standard route via bar/semifinished product production in the steelworks, sawing the pins for forging and the carburizing process are omitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Rolling Contact Bearings (AREA)
  • Coating By Spraying Or Casting (AREA)
US12/301,277 2006-05-19 2007-05-10 Method for producing a rolling bearing component and rolling bearing component Expired - Fee Related US8499458B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102006023690 2006-05-19
DE102006023690A DE102006023690A1 (de) 2006-05-19 2006-05-19 Verfahren zur Herstellung eines Wälzlagerbauteils sowie Wälzlagerbauteil
DE102006023690.4 2006-05-19
PCT/DE2007/000854 WO2007134571A1 (de) 2006-05-19 2007-05-10 Verfahren zur herstellung eines wälzlagerbauteils sowie wälzlagerbauteil

Publications (2)

Publication Number Publication Date
US20090310898A1 US20090310898A1 (en) 2009-12-17
US8499458B2 true US8499458B2 (en) 2013-08-06

Family

ID=38523447

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/301,277 Expired - Fee Related US8499458B2 (en) 2006-05-19 2007-05-10 Method for producing a rolling bearing component and rolling bearing component

Country Status (10)

Country Link
US (1) US8499458B2 (ja)
EP (1) EP2024526A1 (ja)
JP (1) JP2009537334A (ja)
KR (1) KR20080110686A (ja)
CN (1) CN101448968B (ja)
AU (1) AU2007252142B2 (ja)
BR (1) BRPI0711934A2 (ja)
DE (1) DE102006023690A1 (ja)
RU (1) RU2446227C2 (ja)
WO (1) WO2007134571A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9453681B2 (en) 2007-03-30 2016-09-27 Ati Properties Llc Melting furnace including wire-discharge ion plasma electron emitter

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8747956B2 (en) * 2011-08-11 2014-06-10 Ati Properties, Inc. Processes, systems, and apparatus for forming products from atomized metals and alloys
DE102012203110A1 (de) 2012-02-29 2013-08-29 Schaeffler Technologies AG & Co. KG Verfahren zur Herstellung eines Lagerbauteils
DE102012015405B4 (de) * 2012-08-03 2014-07-03 Federal-Mogul Burscheid Gmbh Zylinderlaufbuchse und Verfahren zu deren Herstellung
DE102013008396B4 (de) 2013-05-17 2015-04-02 G. Rau Gmbh & Co. Kg Verfahren und Vorrichtung zum Umschmelzen und/oder Umschmelzlegieren metallischer Werkstoffe, insbesondere von Nitinol
US20160138151A1 (en) * 2013-06-10 2016-05-19 Hitachi, Ltd. Steel Part and Method for Manufacturing the Same
CN104878342A (zh) * 2015-05-18 2015-09-02 广东省工业技术研究院(广州有色金属研究院) 一种钨粉增强铝基复合材料的制备方法及装置
CN110625312B (zh) * 2019-08-23 2021-10-29 泉州台商投资区长矽工业设计有限公司 一种具有被动式增强淬硬性的钢材加工用焊接机器手
RU209264U1 (ru) * 2021-09-06 2022-02-10 Сергей Иванович Никитин Подшипник качения
DE102022118368A1 (de) 2022-07-22 2024-01-25 Schaeffler Technologies AG & Co. KG Wälzlagerelement und Verfahren zur Herstellung eines Wälzlagerelementes

Citations (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE47829C (de) 1888-12-14 1889-07-17 HALLE'sche ARMATUREN- UND MASCHINENFABRIK, A. WERNEBURG & CO., in Halle a. Saale Wasserabscheider für verticale Dampfleitungen
DE2143496A1 (de) 1970-09-04 1972-03-09 Kovofinish Np Verfahren zum Spritzen von ge schmolzenen Metallen
DE3306142A1 (de) 1982-02-23 1983-09-01 National Research Development Corp., London Verfahren zur herstellung eines zweiphasigen oder mehrphasigen metallischen materials
EP0491521A2 (en) 1990-12-15 1992-06-24 Fujitsu Limited Process for producing diamond film
DE4321673A1 (de) 1992-07-07 1994-01-13 Ford Werke Ag Thermisches Sprühen von Zusammensetzungen aus Metall und Feststoffschmiermitteln unter Verwendung von Draht als Ausgangsmaterial
DE19525702A1 (de) 1995-07-14 1997-01-16 Fag Aircraft Gmbh Wälzlager
DE19637737A1 (de) 1995-10-06 1997-04-10 Ford Werke Ag Verfahren zur Abscheidung einer Eisenoxid-haltigen Beschichtung auf ein Leichtmetallsubstrat
WO1997047415A1 (en) 1996-06-12 1997-12-18 The Regents Of The University Of California Spray deposition in a low pressure environment
WO1997047780A1 (en) 1996-06-13 1997-12-18 The Regents Of The University Of California Spray formed multifunctional materials
JPH11247861A (ja) 1998-03-03 1999-09-14 Senshin Zairyo Riyo Gas Generator Kenkyusho:Kk 転がり軸受用保持器
WO1999051791A1 (en) 1998-04-08 1999-10-14 Caterpillar Inc. Component having a functionally graded material coating for improved performance
WO1999051790A1 (en) 1998-04-08 1999-10-14 Caterpillar Inc. A process for applying a functional gradient material coating to a component for improved performance
WO1999067075A2 (en) 1998-06-23 1999-12-29 National University Of Singapore Functionally gradient materials and the manufacture thereof
DE69613584T2 (de) 1995-10-06 2001-10-04 Ford Motor Co. Ltd., Brentwood Verfahren zum auftragen metallischer verbundschichten
WO2001096049A1 (en) 2000-06-12 2001-12-20 Bechtel Bwxt Idaho, Llc Rapid solidification processing system for producing molds, dies and related tooling
US20020064667A1 (en) * 1998-02-27 2002-05-30 Scheckenbach Dl. Helmut Thermal spray powder incorporating a particular high temperature polymer
DE69710007T2 (de) 1996-08-22 2002-07-18 Sulzer Metco Japan Ltd., Tokio/Tokyo Verfahren zum Hochgeschwindigkeitsflammspritzen
DE69524997T2 (de) 1994-06-06 2002-08-29 Toyota Jidosha K.K., Toyota Verfahren zum Spritzen von Material, Verfahren zur Herstellung eines Gleitelementes mit gespritzter Gleitschicht; Kolben und Verfahren zu seiner Herstellung
DE10161820A1 (de) 2000-12-14 2002-09-05 Ntn Toyo Bearing Co Ltd Elektrokorrosionsbeständiger Wälzlageraufbau
US6485681B1 (en) * 1995-09-01 2002-11-26 Erbsloeh Ag Process for manufacturing thin pipes
DE10137785A1 (de) 2000-08-04 2003-02-20 Ntn Toyo Bearing Co Ltd Elektrokorrosionsbeständiger Wälzlageraufbau
US6569546B1 (en) * 1998-09-10 2003-05-27 Nippon Steel Hardfacing Co., Ltd. Member with film formed by thermal spraying of thermal spray material
DE69718313T2 (de) 1997-03-31 2003-07-31 Ford Global Technologies, Inc. Beschichtung von Zylinderbohrung aus Metall für Motorblock
DE10204252A1 (de) 2002-02-02 2003-08-14 Daimler Chrysler Ag Verfahren und Spitzpistole zum Lichtbogenspritzen
JP2004011793A (ja) 2002-06-07 2004-01-15 Okuma Corp 直動ガイド
DE102004008143A1 (de) 2003-03-25 2004-10-14 Ford Global Technologies, LLC (n.d.Ges.d. Staates Delaware), Dearborn Verfahren zur Verbesserung der Adhäsion von Metallpartikeln an Keramikmodellen
DE102004038572A1 (de) 2003-08-06 2005-03-10 Uwe Steinfuehrer Verschleißfester Überzug zum Schutz einer Oberfläche und Verfahren zur Herstellung desselben

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD47829A5 (de) * 1963-10-30 1966-04-20 Rothe Erde Eisenwerk Wälzlagerring grossen Durchmessers, insbesondere Ring für mittenfreie Wälzlagerdrehverbindungen
JPS5273259A (en) * 1975-12-13 1977-06-18 Ogura Clutch Co Ltd Friction material for electromagnetic clutch brake and method of forming
US5077090A (en) * 1990-03-02 1991-12-31 General Electric Company Method of forming dual alloy disks
JPH0688201A (ja) * 1992-09-07 1994-03-29 Toshiba Corp 水車用傾斜組成部品の製造法
JPH08199372A (ja) * 1995-01-26 1996-08-06 Nisshin Steel Co Ltd 傾斜機能材料の製法および装置
JP2919301B2 (ja) * 1995-05-02 1999-07-12 山口県 溶射による傾斜組成皮膜形成方法
US5841033A (en) * 1996-12-18 1998-11-24 Caterpillar Inc. Process for improving fatigue resistance of a component by tailoring compressive residual stress profile, and article
RU2218425C2 (ru) * 2001-02-21 2003-12-10 Чудинов Борис Анатольевич Способ создания упрочненного поверхностного слоя на деталях из металлических сплавов и композиционных материалов

Patent Citations (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE47829C (de) 1888-12-14 1889-07-17 HALLE'sche ARMATUREN- UND MASCHINENFABRIK, A. WERNEBURG & CO., in Halle a. Saale Wasserabscheider für verticale Dampfleitungen
DE2143496A1 (de) 1970-09-04 1972-03-09 Kovofinish Np Verfahren zum Spritzen von ge schmolzenen Metallen
DE3306142A1 (de) 1982-02-23 1983-09-01 National Research Development Corp., London Verfahren zur herstellung eines zweiphasigen oder mehrphasigen metallischen materials
EP0491521A2 (en) 1990-12-15 1992-06-24 Fujitsu Limited Process for producing diamond film
DE4321673A1 (de) 1992-07-07 1994-01-13 Ford Werke Ag Thermisches Sprühen von Zusammensetzungen aus Metall und Feststoffschmiermitteln unter Verwendung von Draht als Ausgangsmaterial
DE69524997T2 (de) 1994-06-06 2002-08-29 Toyota Jidosha K.K., Toyota Verfahren zum Spritzen von Material, Verfahren zur Herstellung eines Gleitelementes mit gespritzter Gleitschicht; Kolben und Verfahren zu seiner Herstellung
DE19525702A1 (de) 1995-07-14 1997-01-16 Fag Aircraft Gmbh Wälzlager
US6485681B1 (en) * 1995-09-01 2002-11-26 Erbsloeh Ag Process for manufacturing thin pipes
DE69613584T2 (de) 1995-10-06 2001-10-04 Ford Motor Co. Ltd., Brentwood Verfahren zum auftragen metallischer verbundschichten
DE19637737A1 (de) 1995-10-06 1997-04-10 Ford Werke Ag Verfahren zur Abscheidung einer Eisenoxid-haltigen Beschichtung auf ein Leichtmetallsubstrat
WO1997047415A1 (en) 1996-06-12 1997-12-18 The Regents Of The University Of California Spray deposition in a low pressure environment
WO1997047780A1 (en) 1996-06-13 1997-12-18 The Regents Of The University Of California Spray formed multifunctional materials
DE69710007T2 (de) 1996-08-22 2002-07-18 Sulzer Metco Japan Ltd., Tokio/Tokyo Verfahren zum Hochgeschwindigkeitsflammspritzen
DE69718313T2 (de) 1997-03-31 2003-07-31 Ford Global Technologies, Inc. Beschichtung von Zylinderbohrung aus Metall für Motorblock
US20020064667A1 (en) * 1998-02-27 2002-05-30 Scheckenbach Dl. Helmut Thermal spray powder incorporating a particular high temperature polymer
JPH11247861A (ja) 1998-03-03 1999-09-14 Senshin Zairyo Riyo Gas Generator Kenkyusho:Kk 転がり軸受用保持器
WO1999051790A1 (en) 1998-04-08 1999-10-14 Caterpillar Inc. A process for applying a functional gradient material coating to a component for improved performance
WO1999051791A1 (en) 1998-04-08 1999-10-14 Caterpillar Inc. Component having a functionally graded material coating for improved performance
WO1999067075A2 (en) 1998-06-23 1999-12-29 National University Of Singapore Functionally gradient materials and the manufacture thereof
US6569546B1 (en) * 1998-09-10 2003-05-27 Nippon Steel Hardfacing Co., Ltd. Member with film formed by thermal spraying of thermal spray material
WO2001096049A1 (en) 2000-06-12 2001-12-20 Bechtel Bwxt Idaho, Llc Rapid solidification processing system for producing molds, dies and related tooling
DE10137785A1 (de) 2000-08-04 2003-02-20 Ntn Toyo Bearing Co Ltd Elektrokorrosionsbeständiger Wälzlageraufbau
DE10161820A1 (de) 2000-12-14 2002-09-05 Ntn Toyo Bearing Co Ltd Elektrokorrosionsbeständiger Wälzlageraufbau
DE10204252A1 (de) 2002-02-02 2003-08-14 Daimler Chrysler Ag Verfahren und Spitzpistole zum Lichtbogenspritzen
JP2004011793A (ja) 2002-06-07 2004-01-15 Okuma Corp 直動ガイド
DE102004008143A1 (de) 2003-03-25 2004-10-14 Ford Global Technologies, LLC (n.d.Ges.d. Staates Delaware), Dearborn Verfahren zur Verbesserung der Adhäsion von Metallpartikeln an Keramikmodellen
DE102004038572A1 (de) 2003-08-06 2005-03-10 Uwe Steinfuehrer Verschleißfester Überzug zum Schutz einer Oberfläche und Verfahren zur Herstellung desselben

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9453681B2 (en) 2007-03-30 2016-09-27 Ati Properties Llc Melting furnace including wire-discharge ion plasma electron emitter

Also Published As

Publication number Publication date
CN101448968B (zh) 2011-04-06
DE102006023690A1 (de) 2007-11-22
RU2446227C2 (ru) 2012-03-27
WO2007134571A1 (de) 2007-11-29
EP2024526A1 (de) 2009-02-18
JP2009537334A (ja) 2009-10-29
BRPI0711934A2 (pt) 2012-02-22
AU2007252142A1 (en) 2007-11-29
RU2008146496A (ru) 2010-05-27
AU2007252142B2 (en) 2010-08-19
CN101448968A (zh) 2009-06-03
US20090310898A1 (en) 2009-12-17
KR20080110686A (ko) 2008-12-18

Similar Documents

Publication Publication Date Title
US8499458B2 (en) Method for producing a rolling bearing component and rolling bearing component
US4597456A (en) Conical cutters for drill bits, and processes to produce same
US4562892A (en) Rolling cutters for drill bits
US4372404A (en) Cutting teeth for rolling cutter drill bit
US4398952A (en) Methods of manufacturing gradient composite metallic structures
US4368788A (en) Metal cutting tools utilizing gradient composites
CN100482836C (zh) 具有梯度结构的硬质合金结构部件
AU2015208035A1 (en) Centrifugal atomization of iron-based alloys
EP0111600A1 (en) Improvements in or relating to cutting tools
CN110290881A (zh) 轧制用复合辊及其制造方法
CN105339587A (zh) 环形工具
CN113649594A (zh) 一种激光增材制造24CrNiMo合金钢的热等静压方法
JP2020501027A (ja) 硬質材料粒子を含む粉末冶金的に製造された鋼材料、こうした鋼材料から部品を製造する方法、及び鋼材料から製造された部品
US8292513B2 (en) Rolling bearing component, and method for the production thereof
KR100374209B1 (ko) 롤의제조방법
US20080299412A1 (en) Method for Manufacturing Metal Components and Metal Component
DE3808285C2 (ja)
CN105441651B (zh) 一种提高机车轮轴钢旋转弯曲疲劳性能的方法
US6305459B1 (en) Method of making spray-formed articles using a polymeric mandrel
DE102006051544A1 (de) Wälzlagerbauteil mit wälzfester Oberfläche und schwingungsdämpfendem Kern, sowie Verfahren zu dessen Herstellung
DE10300966B4 (de) Gleitschicht, deren Verwendung und Verfahren zu deren Herstellung
JPH02190465A (ja) 複雑形状部品とその製造方法
JPS60158906A (ja) 圧延用複合ロ−ルおよびその製造方法
US20130136647A1 (en) Powder-metallurgical steel
KR20240043457A (ko) 적층 제조용 고경도 합금 소재 및 그에 따른 부품

Legal Events

Date Code Title Description
AS Assignment

Owner name: SCHAEFFLER KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TROJAHN, WERNER;ROESCH, SILKE;REEL/FRAME:021953/0366

Effective date: 20081119

AS Assignment

Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCHAEFFLER KG;REEL/FRAME:028523/0790

Effective date: 20100128

AS Assignment

Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, GERMANY

Free format text: CHANGE OF NAME;ASSIGNOR:SCHAEFFLER TECHNOLOGIES GMBH & CO. KG;REEL/FRAME:028533/0036

Effective date: 20120119

STCF Information on status: patent grant

Free format text: PATENTED CASE

AS Assignment

Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, GERMANY

Free format text: MERGER AND CHANGE OF NAME;ASSIGNORS:SCHAEFFLER TECHNOLOGIES AG & CO. KG;SCHAEFFLER VERWALTUNGS 5 GMBH;REEL/FRAME:037732/0228

Effective date: 20131231

Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, GERMANY

Free format text: CHANGE OF NAME;ASSIGNOR:SCHAEFFLER TECHNOLOGIES GMBH & CO. KG;REEL/FRAME:037732/0347

Effective date: 20150101

AS Assignment

Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, GERMANY

Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE PROPERTY NUMBERS PREVIOUSLY RECORDED ON REEL 037732 FRAME 0347. ASSIGNOR(S) HEREBY CONFIRMS THE APP. NO. 14/553248 SHOULD BE APP. NO. 14/553258;ASSIGNOR:SCHAEFFLER TECHNOLOGIES GMBH & CO. KG;REEL/FRAME:040404/0530

Effective date: 20150101

FPAY Fee payment

Year of fee payment: 4

FEPP Fee payment procedure

Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

LAPS Lapse for failure to pay maintenance fees

Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20210806